Monday, November 06, 2006
A Step Towards Quantum Networks
Pasadena (USA), 05 November: The operations of two remote quantum systems can be synchronized, according to research to be published in the December issue of Nature Physics. Jeff Kimble and colleagues report that they can synchronize operations in such a way that changes in one system are conditional on what happens in the other, giving a level of real-time control that has not previously been achieved.
Quantum networking plays a key role in a series of proposed quantum communication and information schemes that hold promise for secure information exchange, as well as the ability to solve certain tasks faster than any classical computer. The nodes of quantum networks- distributed over remote locations- host quantum objects like atoms, ions or molecules, whereas quantum channels allow information to be transmitted between the nodes, typically in the form of photons.
A practical quantum network requires synchronized operations to be performed on states stored in separated nodes. The authors address the specific task of producing a pair of identical photons from two quantum nodes. They make one node ready for emitting a single photon, but, before actually releasing the particle, wait for the other node to be ready. This significantly increases the probability that two photons are fired simultaneously, when compared with a situation without such conditional control. The authors believe that their technique could have important implications for the future development of quantum networks.
(ResearchSEA)
Quantum networking plays a key role in a series of proposed quantum communication and information schemes that hold promise for secure information exchange, as well as the ability to solve certain tasks faster than any classical computer. The nodes of quantum networks- distributed over remote locations- host quantum objects like atoms, ions or molecules, whereas quantum channels allow information to be transmitted between the nodes, typically in the form of photons.
A practical quantum network requires synchronized operations to be performed on states stored in separated nodes. The authors address the specific task of producing a pair of identical photons from two quantum nodes. They make one node ready for emitting a single photon, but, before actually releasing the particle, wait for the other node to be ready. This significantly increases the probability that two photons are fired simultaneously, when compared with a situation without such conditional control. The authors believe that their technique could have important implications for the future development of quantum networks.
(ResearchSEA)
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